Which of the following statements about soil on earth is not accurate?
A. It always has some organic material in it.
B. It always has weathered rock fragments in it.
C. It is often referred to only as "dirt."
D. It commonly has air and water in it.
E. All of these choices are correct.
Answer: E
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How is ocean acidification possibly linked to increased anthropogenic emissions of carbon dioxide (CO2)?
A) Atmospheric CO2 combines with atmospheric moisture forming a light carbonic acid forms (H2CO3), that is precipitated over the world's oceans. B) Thermohaline circulation exchanges carbon between surface dissolved organic carbon and deep layers of dissolved inorganic carbon. C) Increased warming results in glacial melt and more runoff of surface pollutants that can contribute to ocean acidification. D) Oceans may absorb much of the concentrations of rising CO2. When dissolved CO2 mixes with saltwater, carbonic acid forms (H2CO3). E) Increased photosynthetic activity in phytoplankton resulting from increased atmospheric CO2 concentrations results in acidification due to a complex chemical reaction during plant decay.
Which substance would be considered a renewable resource?
A. copper B. oil C. clean air D. salt E. sand
The process that decomposes rocks and minerals by altering the makeup of the parent material is called ____________________
Fill in the blank(s) with correct word
The Great Lakes Water Quality Agreement between the United States and Canada improved water quality by ____.
A. increasing nitrogen inputs B. upgrading sewage treatment plants C. banning invasive species D. closing beaches E. banning commercial fishing